Broadband satellite communication networks are hotspots in the current satellite communication industry and show the greatest growth in the commercial market of communication satellites. This paper compares the system construction and technology development in China with the international advanced levels in terms of satellite system deployment, satellite technology development and communication system. To boost the development of space-based information network, the paper discusses the development trend and paradigm change of broadband satellite communication networks and looks ahead to the research directions of their key technologies. Suggestions and measures are also put forward for the development of broadband satellite communication network technology in China.